feat: Implement storage provider management functionality

- Added new routes and handlers for managing storage providers, including creation, editing, and deletion.
- Introduced a new StorageProvider form component for user input.
- Enhanced the database schema to support storage provider references in transfer configurations.
- Implemented encryption for sensitive fields in storage provider data.
- Added tests for storage provider API endpoints and integration with the database.
- Updated frontend components to support storage provider selection and testing.

internal/db/storage_provider_validator_test.go

@@ -0,0 +1,141 @@
+package db
+
+import (
+	"testing"
+)
+
+// TestStorageProviderValidation tests the validation of storage providers
+func TestStorageProviderValidation(t *testing.T) {
+	tests := []struct {
+		name      string
+		provider  StorageProvider
+		wantError bool
+	}{
+		{
+			name: "Valid SFTP provider",
+			provider: StorageProvider{
+				Name:     "Test SFTP",
+				Type:     ProviderTypeSFTP,
+				Host:     "example.com",
+				Port:     22,
+				Username: "user",
+				Password: "pass",
+			},
+			wantError: false,
+		},
+		{
+			name: "Invalid SFTP provider - missing host",
+			provider: StorageProvider{
+				Name:     "Test SFTP",
+				Type:     ProviderTypeSFTP,
+				Port:     22,
+				Username: "user",
+				Password: "pass",
+			},
+			wantError: true,
+		},
+		{
+			name: "Valid S3 provider",
+			provider: StorageProvider{
+				Name:      "Test S3",
+				Type:      ProviderTypeS3,
+				AccessKey: "accesskey",
+				SecretKey: "secretkey",
+				Region:    "us-west-1",
+			},
+			wantError: false,
+		},
+		{
+			name: "Valid OneDrive provider",
+			provider: StorageProvider{
+				Name:         "Test OneDrive",
+				Type:         ProviderTypeOneDrive,
+				ClientID:     "clientid",
+				ClientSecret: "clientsecret",
+			},
+			wantError: false,
+		},
+		// Testing all provider types to ensure they're correctly recognized in the switch statement
+		{
+			name: "Valid Hetzner provider",
+			provider: StorageProvider{
+				Name:     "Test Hetzner",
+				Type:     ProviderTypeHetzner,
+				Host:     "example.com",
+				Port:     22,
+				Username: "user",
+				Password: "pass",
+			},
+			wantError: false,
+		},
+		{
+			name: "Valid FTP provider",
+			provider: StorageProvider{
+				Name:     "Test FTP",
+				Type:     ProviderTypeFTP,
+				Host:     "example.com",
+				Port:     21,
+				Username: "user",
+				Password: "pass",
+			},
+			wantError: false,
+		},
+		{
+			name: "Valid SMB provider",
+			provider: StorageProvider{
+				Name:     "Test SMB",
+				Type:     ProviderTypeSMB,
+				Host:     "example.com",
+				Share:    "share",
+				Username: "user",
+				Password: "pass",
+			},
+			wantError: false,
+		},
+		{
+			name: "Valid Google Drive provider",
+			provider: StorageProvider{
+				Name:         "Test Google Drive",
+				Type:         ProviderTypeGoogleDrive,
+				ClientID:     "clientid",
+				ClientSecret: "clientsecret",
+			},
+			wantError: false,
+		},
+		{
+			name: "Valid Google Photo provider",
+			provider: StorageProvider{
+				Name:         "Test Google Photo",
+				Type:         ProviderTypeGooglePhoto,
+				ClientID:     "clientid",
+				ClientSecret: "clientsecret",
+			},
+			wantError: false,
+		},
+		{
+			name: "Valid Local provider",
+			provider: StorageProvider{
+				Name: "Test Local",
+				Type: ProviderTypeLocal,
+			},
+			wantError: false,
+		},
+		{
+			name: "Invalid provider type",
+			provider: StorageProvider{
+				Name: "Test Invalid",
+				Type: "invalid_type",
+			},
+			wantError: true,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			err := tt.provider.Validate()
+			if (err != nil) != tt.wantError {
+				t.Errorf("Validate() error = %v, wantError %v", err, tt.wantError)
+			}
+		})
+	}
+}